
Difference Engine No. 1
circa 1832
circa 1832
1801
1801-1830
1788
1847-1848
1815-1825
1800-1830
circa 1846
1851
1819
1829
1860
1835
1848
1785
1852
1796-1798
1853-1857
1838
1850-1860
1858
1805
1839 (original); circa 1988 (replica)
1846
1849
circa 1848
1844
1853-1857
1845-1855
1821
1801-1840 (original); 1901 (model)
1806
1850-1856
1850-1859
1845
1851
1850-1859
1853
1793-1803
1849
1855
1846-1859
1854
1840
1842
1853
1850
1837
1794
1837